Reg ORA-29283

Question

Hi,
I'm using forms6i.
I have a form which allows users to store their files, either
(1) to the filesystem or
(2) in the db as blob.
In the 2nd case, when user tries to view the file, i recreate the file from the stored blob, with the same filename(gets from the table itself)
and then open the file for the user using HOST command.
But my issue is , once they tries to view the file, a file is created in the specified dir, and opened.
But when second time they try to open it, it throws error ORA-29283, invalid file operation.
The reason i think is, the file already exists, so when it tries to again create the same file, error occurs.(because every time i manually go and delete the already existing file, it works).
So once they close the file after viewing , i should delete the file.
But When i should issue delete? How i know they have closed the file?
Please help
Thanks

Answer 1

Thanks christian,
I changed my code like this
     Host( 'cmd /c dir /B "\\192.168.0.12\testdir\'||:fum_filename||'"',no_screen);  -- Checking the existance of the file
     IF  form_success THEN
          Host( 'cmd /c  attrib +rw "\\192.168.0.12\testdir\'||:fum_filename||'"',NO_SCREEN ) ;
     End if;
     retrieve_blob(:fum_filename,:fum_ref,stat,stat_msg);  -- This procedure recreates the file from the blob.
     Host( 'cmd /c  attrib +r "\\192.168.0.12\testdir\'||:fum_filename||'"',NO_SCREEN ) ;
     Host( 'cmd /c "\\192.168.0.12\testdir\'||:fum_filename||'"',NO_SCREEN ) ;But still of no help! Am i doing right??